[1]Loyalka, P., Liu, O. L., Li, G., Kardanova, E., Chirikov, I., Hu, S., … Li, Y. (2021). Skill levels and gains in university STEM education in China, India, Russia and the United States. Nature Human Behaviour, 5(7), 892–904. doi:10.1038/s41562-021-01062-3
[2]https://mp.weixin.qq.com/s/Cak8Dqiuva0pe1JAX71djg
p.s. 有兴趣的可以看看,若公众号描述与原文不符,欢迎评论指正